You might have to tow it to the 2038 and later Classic car shows, though, because battery replacements might be unobtainum. Or, maybe by then you'll be able to modify it to take the latest nano battery, with a range of 1,000 miles.

The Tesla and Fisker are both interesting cars and will certainly retain some of their value in the future, but there are a number of factors against their becoming really valuable in the future---for one thing, they made too many of them (unlike say, A Ferrari Enzo, of which only 400 were built, or a Tucker, of which only 51 were built).

Secondly, by the time a Tesla or Fisker would be worth what you originally paid for one, you'd probably be dead.

I suspect that Tesla and Fisker will be more Delorean than Enzo---a curiosity that someone will want to collect but not for big bucks.